and millions... are polluting our environment. [ sniffing ] [ seagulls squawking ] >> the path the top stories the massive head under way right now of the alleged boston marathon bomber that is still on the list this morning. one officer is dead, a security officer from mit, a second officer was injured by the suspect. one suspect was killed in the shadow by police overnight, the second suspect is still at large this morning. >> we've had very rapidly developing situation and of course i have been briefed throughout the night. you know the basics that suspect one is dead, suspect to is on the run. we have been in bta officer who was seriously wounded and is in surgery right now. we have mit's security who has been killed. there is a massive manhunt underway a lot of law enforcement involved in that. we have suspended all service on the nbc a, a public transit service and that will continue until it is safe to open their if they're asking people to a shelter in place, and other words stay indoors with the doors locked and do not open the door for anyone other than a properly identified